No "bbPress – User Register" in template?!

Hi, I’m trying to create a bbpress Registration page so that users can register and start posting on my website’s forum. I’ve read through the tutorials on how to do this but there’s a problem. After adding a new Page, under Page Attributes we are supposed to select “bbPress – User Register” as the template. But I don’t see this as an option on the dropdown menu at all.

In fact, the dropdown menu has nothing related to bbPress at all. I’m starting to wonder if the plugin wasn’t installed properly, but the rest of it seems to work fine (eg. I can create forums/threads etc and these are showing up).

Argh. Now the opposite is true–http://museumnation.com/register/ doesn’t work, and the other does. The change happened when I removed “www” from the WP and site URLs in Settings –> General, as described here: http://ma.tt/2006/06/wordpress-no-www/